#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>

int main()
{
    pid_t ppid = getppid();
    pid_t pid = getpid();
    while(1)
    {
        printf("hello linux!, I am a process, pid: %d, ppid: %d\n", pid, ppid);
        sleep(1);
    }

} 

